Lasting machine



July 27, 1948. c. w. BAKER 2,445,845

LASTING MACHINE Filed April 2. 1947 2 Sheets-Sheet 2' 360 366' 25 &5z IZ70 Patented July 27, 1948 UN ITEDJ STATES PATENT OFF ICE LASTINGMACHINE Corwin W. Baker, Beverly, Mass, assignor to United ShoeMachinery Corporation, Flemington, N. La; corporation of New JerseyApplication April2, 1947, Serial No. 738,868

21*Claims.

This invention relates to machines for operating on shoes and ishereinillustrated as embodied in a lasting machine ofthe type disclosedin an application for United" States Letters Patent Serial No. 680,013,filed inmy name on June 28, 1946, now Patent No. 2,431,362. However, itis to be understood that the invention is not limited to a machineorganization of the particu ar character disclosed in saidpatent.

In the machine of the aforementioned patent, the stock is tensioned,heightwise'of a shoe, by grippers which are'alsomovable-in a directionto feed the shoe, and the lasting marginof, the tensioned stock is wipedin over, and "pressed against, the bottom of the shoe by meansof areciprocating wiper, operating in time relation to the tensioning'andfeeding movements of the grippers. For applying additional pressure tothe lasting margin, thus to augment thepressing action of the wiper insecuring the lasting margin adhesively in lasted position, a pressermember is provided which is arranged to cooperate with a shoe-bottomrest for supporting the shoe against the pull applied by the gripper;this presser member and shoe-bottom rest being arrangedto move with thegripper when the shoe is being fed' and the stock tensioned. During theback-feeding movements of the gripper, shoe-bottom rest and pressermember, retrograde movement of the shoe is prevented by the pressurethen' being applied to the lastingmargin of the stock by the wiper.

After the completion of the lastingoperation, the exposed surface of thelasting margin-of the stock is next roughened to condition it for thereception of adhesive usedfor attaching an outersole to the bottom ofthe shoe. This is usually done by presenting the bottom of the shoe toan abradin-g tool, for example, a rotary wire brush, and involves aseparate operation in the manufacture of the shoe requiring the extratime and labor of a skilled workman.

It is an object of this invention to avoid the extra time and labor, aswell as theresulting expense involved in the above procedure, bycombining the lasting of thestock and the roughening of the exposedsurface of its lasting margin on the bottom of the shoe in-a singleoperation. With this end in view, and in accordance with a feature ofthe invention, the herein illustrated machine, which like the machine ofthe mentioned patent has grippers for tensioning thestockand feeding theshoe, is provided with means for abrading the exposed surface of thelasting margin of the stock as the lasting, operation proceeds, so

2 that, upon the completion of the lasting operation,the bottom of theshoe is in condition to receive adhesive for the attachment of anoutersole thereto. i

More particularly, and in accordance with a further feature of theinvention, the abrading means comprises a rotary tool which is alsoarranged to havea component of action directed inwardly from the edge ofthe shoe bottom for wiping the lasting marginof the stock in over, andfor pressing it against, the shoe bottom.

Accordingly, the roughing tool serves also as a wiper which, in theherein illustrated machine, is substituted for the reciprocating wiperof the machin disclosed in the aforementionedpatent and 'is locatedclosely adjacent to the'tensioning and feeding gripper. Thus, as thisgripper tensions the stock heightwise of the shoe,=the lasting margin isnot only drawn against the tool and abraded thereby but also is wipedinwardly from the-edge-of, and pressed against,- the shoe bottom.Preferably, and as herein illustrated, the pressing member of themachine-of the aforementioned patent is retained to augment the actionofth e roughing tool in pressing the lasting margin against the'bottomof the shoe and also to cooperate withthe shoe-bottom rest in supportingthe sh-oe against the pull applied to :the stock bythe gripper. Y i

The. above and other objects and features of the invention will beapparent from the following detailed description of a preferredembodiment thereof, illustrated in theaccompanying drawings, andwillbepointed out in the claims.-

In theidrawings,

Fig. 1 isa view, inside elevation and with certain portions broken away,of alastin-g machine embodying the features of this invention; Fig. 2 isa View, in front elevation and with parts broken away, of the machine*shownf in Fi 1;

Fig; 3 is a detail view of "one .ofthe operating elements ofthemachiney' Figs'.4 to9 are-aaseriesof views, in plan: and sideelevation, of the-operating elements of the machine shown-indifferentposit-ions assumed during the lasting .of a. shoe.

The. herein illustrated machine is, ,withone exception to be noted,below, exactly like the lasting ma chine. disclosed .in .theabove-mentioned patent and is providedwith a gripper comprising an upperjaw 20 and a lower jaw 22, a presser member '26, a shoe-bottom rest 28and a,.pair,l of edge gage ,rolls .60; 30. However, for the purposes gofthis invention; in place of the recipro-i eating Wiper (24) of themachine of my prior patent, th herein illustrated machine is providedwith a rotary tool indicated generally by the reference character 24.These operating instrumentalities are all associated with a hollow head32 having a hinged cover 34. The gripper jaws 23,22, presser member 23and shoe-bottom rest 28 are operated by mechanism contained within thehead 32 and, inasmuch as this operating mechanism is exactly the same asthat disclosed and described in the above-mentioned patent, it will bebut briefly referred to herein. In order to facilitate reference to theprior application for an understanding of the construction of thismechanism, the corresponding parts of the herein illustrated machine areidentified in the drawings with the same reference characters as wereused in the prior patent.

The upper jaw 23 is secured, by means of screws 4ll,to a slide 42 whichis mounted in suitable guideways, not shown, formed in a radiallyextending portion 46 of a hub 48. This hub has a downwardly projectingpost 50 which is jour-' naled in a portion of the head 32, see Fig. 1.The lower jaw, is pivotally mounted on the slide 42, by means of a pin64, and a compression spring 18 is arranged to swing this jaw, in aclockwise direction about the pivot provided by the pin 54, thusyieldingly to close the jaws. For opening these jaws, against th actionof this spring, a toggle comprising links 92, 94 is provided. The link92 is connected to a portion of the lower jaw 22 while the link 94 ispivoted to a post 96 which rises upwardly from the slide .42. The link94 is also provided with a flat surface 38 for engagement with a roll mocarried by an arm I02. As in the machine of my prior patent, this arm isoscillated, by means of a cam, not shown, and through connectionsincluding a rod I50 and links Hi8, H0, in such a way that the jaws areperiodically opened and closed. Also the slide 42 is reciprocated, tomove the jaws in a direction extending heightwise of a shoe presented tothe machine, and the hub 48 is oscillated, to swing the jaws in adirection extending lengthwise of the shoe, in time relation to theoperation of the gripper jaws, by cam-operated mechanism not shown butsimilar to that in my prior machine.

The rotary tool '24, which as has already been noted replaces thereciprocating wiper of the prior machine, is formed on the lower end ofa shaft 23!). This shaft, which is journaled in a bearing block 232 andheld against axial movement therein by collars 234, 236, extendsdownwardly through a clearance opening 233 provided in the cover 34 andthe bearing block is pivotally mounted on a yoke 240, by means oftrunnion screws 242, 242. This yoke has a cylindrical stem 244 which isadjustably secured, by means of setscrews 245, 246, in a bore 248 formedin the end of a support 250, carried by the cover 34. Extending betweenthe bearing block 232 and the cover 34 is a turnbuckle 252. As will bereadily apparent, by loosening the screws246 and operating theturnbuckle 252, the tool 24 may be suitably positioned relatively to theother operating elements of the machine and also with respect to thebottom of a shoe. and in the direction indicated by the arrows in Figs.4, 6 and 8, by means of a belt 23! and a pulley 233, secured to theupper end of the shaft 230. This belt is connected to a power pulley,not shown, andi'strained over two idle pulleys carried by the support250, one of which is indicated by The tool 24 is rotated, at a highspeed the reference character 235 in Fig. 1 of the drawings.

The presser member 26 is pivotally mounted on the outer end of a bracket260, by means of a stud 262, Figs. 4, 6 and 8, and a spring-pressedplunger 264, alined with the axis of this stud, yieldingly holdsthepresser member in the position in which it is shown in Figs. 1, 5 and 9while permitting this member to rock about the axis of the stud 262 soas to lie flatly on the bottom of a shoe even if the latter is inclinedin the manner shown in Fig. '7, The bracket 260 is adjustably secured,by means of a screw 266, to the front end of a slide 2'!!! which ismounted in a second guideway, not shown, formed in the extending portion46 of the hub 48. This slide is reciprocated, to move the presser membertoward and away from the bottom of a shoe, and is also swung by theoscillation of the hub 48 so. as to follow the swinging movements of thegripper jaws, by means of operating mechanism, not shown, but similar tothat disclosed in the prior patent referred to above.

The shoe-bottom rest 28, which is secured to the hub 48 by means ofscrews 2%, 236, likewise partakes of the swinging movement of thegripper jaws. The edge gage rolls 3!), 30 are journaled on studs carriedby a bracket 330 which is adjustably mounted on a forwardly projectingportion of the'cover 34 by means of a screw 302. The head 32 is providedwithan opening 3|4 through which the operating elements, just described,

project.

Referring particularly to Figs. 3, 4, 6 and 8, the rotary tool 24 isformed by providing thelower end of the shaft 230 with a helical rib400, of the generally triangular shape shown, and traversing this ribwith a plurality of circumferentially spaced angular notches 422. Theseangular notches are so shaped with respect to the direction of, rotationof the shaft 238 that the tool 24 acts as a cutter or abrading device.Also, the pitch of the helical rib 400 is such that this tool has acomponent of action directed axially and downwardly thereof as viewed inFigs. 1, 3, 5, 7 and 9. a

Except for the action of the rotary tool 24, the herein illustratedmachine operates to last a shoe, shown as comprising an upper Uassembled with an insole I on a last L, in the same manner as themachine of my patent. Referring to Figs. 4 to 8 of the drawings, inFigs. 4 and 5 the operating elements of the machine are shown in thepositions assumed at the beginning of a cycle of operations, theshoe-bottom rest bearing against insole I, the presser member pressing aportion of the lasting margin of the upper against the insole, and thegripper jawsclosed on the lastingmargin of the upper. As the operationproceeds, the gripper jaws move in a direction heightwise of the shoe,and to the right, to tension the upper over the last and, while theupper is thus being tensioned, these jaws, together with the shoe-bottomrest and presser member, which is still engaging the shoe bottom, swingin a direction extending lengthwise of the shoe-to feed the shoe, theoperating elements eventually reaching the position shown in Figs. 6 and7. The gripper jaws now open and the presser member is withdrawn fromthe shoe bottom, as these parts,

together with the shoe-bottom rest, swing in a sioned by the gripperjaws successively, in differant locations,.along the edge of the: bottomof. the shoe, and the lasting: margin of the upper is pressedagainst theinsole by the presser memher and also by the rotary toolwhich engagesthe lasting margin in a location between the gripper jaws andthe pressermember. As, will be understood, the lasting margin and/or the bottom ofthe insole will have been previously coated with suitable adhesive sothat, as a result of theaforementioned pressing action, the lastingmargin of the tensioned upper is adhesively secured in lastedposition onthe insole. In additionto its'pressing function, the rotary tool wipesthe lasting margin inwardly from the edge of the shoe'bottom, as aresult of the axial com ponentof its action and, at thesame time, theteethbon this tool, formed by the notches M12, abrade theexposed surfaceof the lasting margin of the upper. This abrading, or roughingactionofthe tool, is augmented-by the tendency of the gripper jaws, atthe end of their feeding movement, to wrap a portion of the lastingmargin of the upper around the tool in the manner ill-ustratedin Fig.6-.

During the operation of the machine, the shoe is guidedagainst the edgegage rolls 30, 3d and is held by the operator with its bottomsubstantially in a vertical plane normal to the directions of movementof the gripper jaws, presser mem her and shoe-bottom rest. However,should the shoe inadvertently be tipped so as to incline its bottomoutof this vertical'plane, the lasting of the-"upper will not be adverselyaffected. Under such conditions, th presser member will pivot about thestud 282 so as to engage the lasting margin flatly, as shown in Fig. '7,and the gripper jaws will still wrap the lasting margin partly aroundthe tool 25 and the functions of this tool to press the lasting marginagainst the shoe bottom and to wipe it inwardly from the edge thereof,as well as to abrade or rough the exposed surface thereof, will still beobtained.

Having described the invention, what I claim as new and desire to secureby Letters Patent of the United States is:

1. In a lasting machine, the combination of means for tensioning stockto be lasted, successively-in different locations along the edge of thebottom of a shoe, and means for abrading the exposed surface of thelasting margin of the stock, said abrading means being constructed andarranged to wipe the lasting margin in over, and to press it against,the bottom of theshoe.

2LIna lasting machine, the combination of means for tensioning stock tobe lasted, successively in different locations along the edge of thebottom of a shoe, means for abrading the exposed surface of the lastingmargin of the stock, and means for pressing the lasting margin of thestock against the shoe bottom in each location.

3. In a lasting machine, the combination of means for tensioning stockto be lasted, successively in different locations along the edge of thebottom of a shoe, and means comprising a rotary tool for abrading theexposed surface of the lasting margin of the stock, said rotary toolbeing constructed and arranged to wipe the lasting margin in over, andto press it against, the bottom of the shoe.

4:. In a lasting machine, the combination of means for tensioning stockto be lasted, successively in different locations along the edge of thebottom of a shoe, and a rotary tool having anoperating face comprisingan interrupted spiral rib for abrading the exposed surface of thelasting margin of the stock, saidl rotarytcol being iconstructed and:arrangeu towipez the-lasting mar: gin: in. over, andiwto press. itagainst; the-bottomof: the shoe? 7 i l i v 5. In a lasting machinathe.combination: of means for tensioning stock to be lasted; successivelyin: difierent locations along the ed'ge of the bottom-of a shoe, meansfor abrading the exposed surface of the lasting margin o f the stock,said abradin'g means being constructed and arrangedto' wipe the lastingmargin in: over,- and to p'ress'it against; thebottomofthe shoe, andadditional means for pressingithe lasting margin Offllle stock againstthe bottomof the "shoe;

6. In a lasting! machine, the combination: of means fortensioningstockto be lasted, successi'velyiri different locations along theiedge of thebottom of a shoe; means comprising" a ma mal for abrading I the exposedsurface of: the lasting margin of the stockg said rotary tool beingeon.- stru'cted and arranged to Wipe thelasting margin in over, and topress it against the bottom of the shoe, and additional means forpressing the lastingmargin oiithe stock against the bottom of the shoe.

'7. In a lasting machine, the combination of means for tensioning stockto be lasted, successively in di'fierent-locations along the edge of thebottom of a shoe, arotarytool having an operating face comprising aninterrupted spiral rib for abrading the exposed surface of the lastingmargin of the stock, saidrotary tool being constructd and arranged toWipe the lasting margin inover, andto press it against, the bottom ofthe shoe; and an additional 'm'eansfor pressing the lasting margin ofthe stock against thebottom of theshoe. i v

8. In a lasting machine, the combination of means for" tensioningstocktobe lasted; successi'velyin different locations along theedge ofthe bottom of a shoe, and forfeedi ng the shoe, and means for abradingthe-exposed su-rface of'the lasting-margin of the stock, said abradingmeans being constructed and arranged to wipe the lasting marginin" over,and to press-it against, the bottom of the shoe.

9. In a lastingmachine; the combination of means for tensioning stock tobe lasted, successively in different locations; albngthe edge of'thebottom of a'shoe, and for feedingth'e shoe, means for abrading theexposed surface of the lasting margin" of thestock, and means forpressing the lasting margin of the stock against the shoe bottom ineachlocation. i

10. In a lasting machine, the combination of means for tensioning stockto be lasted, successively in different locations along the edge of thebottom of a shoe, and for feeding the shoe, and means comprising arotary tool for abrading the exposed surface of the lasting margin ofthe stock, said rotary tool being constructed and arranged to wipe thelasting margin in over, and to press it against, the bottom of the shoe.

11. In a lasting machine, the combination of means for tensioning stockto be lasted, successively in different locations along the edge of thebottom of a shoe, and for feeding the shoe, and

a rotary tool having an operating face comprising an interrupted spiralrib for abrading the exposed surface of the lasting margin of the stock,said rotary tool being constructed and arranged to wipe the lastingmargin in over, and to press it against, the bottom of the shoe.

12. In a lasting machine, the combination of means for tensioning stockto be lasted, successively in different locations along the edge of thebottom of a shoe, and for feeding the shoe, means for abrading'theexposed surface of the lasting margin of the stock, said abrading meansbeing constructed and arranged to wipe the lasting margin in over, andto press it against, the bottom of the shoe, and additional means forpressing the lasting margin of the stock against the bottom of the shoe.

13. In a lasting machine, the combination of means for tensioning stockto be lasted, successively in different locations along the edge of thebottom of a shoe, and for feeding the shoe, means comprising a rotarytool for abrading the exposed surface of the lasting margin of thestock, said rotary tool being constructed and arranged to wipe thelasting margin in over, and to press it against the bottom of the shoe,and additional means for pressing the lasting margin of the stockagainst the bottom of the shoe.

14. In a lasting machine, the combination of means for tensioning stockto be lasted, successively in different locations along the edge of thebottom of a shoe, and for feeding the shoe, ;a rotary tool having anoperating face comprising an interrupted spiral rib for abrading theexposed surface of the lasting margin of the stock, said rotary toolbeing constructed and arranged to wipe the lasting margin in over, andto press it against, the bottom of the shoe, and an additional means forpressing the lasting margin of the stock against the bottom of the shoe.

15. In a lasting machine, the combination of intermittently operatinggripper means for tensioning stock to be lasted, successively indifferent locations along the edge of the bottom of a shoe, and meansfor abrading the exposed surface of the lasting margin of the stock,said abrading means being constructed and arranged to wipe the lastingmargin in over, and to press it against the bottom of the shoe.

16. In a lasting machine the combination of intermittently operatinggripper means for tensioning stock to be lasted, successively indifferent locationsalong the edge of the bottom of a shoe, and meanscomprising a rotary tool-for abrading the exposed surface of the lastingmargin of the stock, said rotary tool being constructed and arranged .towipe the lasting margin in over, and to press it against, thebottom ofthe shoe.

17. In a lasting machine, the combination of intermittently operatinggrippermeans for tensioning stock to be lasted, successively indifferent locations along the edge of the bottom of a shoe, means forabrading the exposed surface of the lasting margin of the stock, saidabrading means being constructed and arranged to wipe the lasting marginin over, and to press it against, the bottom of the shoe, and additionalmeans for pressing the lasting margin of the stock against the bottom ofthe shoe.

18. In a lasting machine, the combination of intermittently operatinggripper means for tensioning stock to be lasted, successively indifferent locations along the edge of the bottom of a shoe, a rotarytool having an operating face comprising an interrupted spiral rib forabrading the exposed surface of the lasting margin of the stock, saidrotary tool being constructed and arranged to Wipe the lasting margin inover, and to press it against, the bottom of the shoe, and an additionalmeans for pressing the lasting margin of the stock against the bottom ofthe shoe.

19. In a lasting machine, the combination of intermittently operatinggripper means for tensioning stock to be lasted, successively indifferent locations along the edge of thebottom of a shoe, and forfeeding the shoe, means for abrading the exposed surface of the lastingmargin of the stock, and means for pressing the lasting margin of thestock against the shoe bottom in each location.

20. In a lasting machine, the combination of intermittently operatinggripper means for tensioning stock to be lasted, successively indifferent locations along the edge of the bottom of a shoe, and forfeeding the shoe, and a rotary tool having an operating face comprisingan interrupted spiral rib for abrading the exposed surface of thelasting margin of the stock, said rotary tool being constructed andarranged to wipe the lasting margin in over, and to press it against,the bottom of the shoe.

21. In a lasting machine, the combination of intermittently operatinggripper means for tensioning stock to be lasted, successively indifferent locations along the edge of the bottom of a shoe, and forfeeding the shoe, means comprising a rotary tool for abrading theexposed surface of the lasting margin of the stock, said rotary toolbeing constructed and arranged to wipe the lasting margin in over, andto press it against the bottom of the shoe, and additional means forpressing the lasting margin of the stock against the bottom of the shoe.

CORWIN W. BAKER.

